Re: tank circuit of VTTC

["Herwig Roscher" <herwig.roscher-at-gmx.de> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

John Freau wrote to the list:

> I tend not to encounter 833A arc-overs until I reach about 5kVAC +
> plate supply.  I've sometimes gone as high as 6kVAC.

John,

6 kVdc is twice(!) the max. plated voltage and confirms that these 
tubes obvious are very robust ones.

> >  6. In the schematic your tank coil is not tapped. How did you 
> >  manage the tuning?
> I often use both methods, and sometimes I just change the capacitance,
> often using a large oil emersed variable capacitor for fine adjustment.
- I'll look for such a tuning aid.

Regards,

Herwig